yum -y install gcc perl wget make pcre-devel openssl-devel expat-devel

mkdir /opt/apache && cd /opt/apache

wget https://dlcdn.apache.org/apr/apr-1.7.0.tar.gz --no-check-certificate
wget https://dlcdn.apache.org/apr/apr-util-1.6.1.tar.gz --no-check-certificate
wget https://github.com/PCRE2Project/pcre2/releases/download/pcre2-10.40/pcre2-10.40.tar.gz --no-check-certificate
wget https://dlcdn.apache.org/httpd/httpd-2.4.54.tar.gz --no-check-certificate
注意：网络原因可能导致pcre2-10.40.tar.gz下载失败，多试几次肯定可以成功

ls *.tar.gz | xargs -n1 tar zxvf && rm -rf *.tar.gz

APR安装

cd /opt/apache/apr-1.7.0 && ./configure --prefix=/opt/apache/apr-1.7.0 && make && make install

cd /opt/apache/apr-util-1.6.1 && ./configure --prefix=/opt/apache/apr-util-1.6.1 \
--with-apr=/opt/apache/apr-1.7.0 && make && make install

cd /opt/apache/pcre2-10.40 && ./configure --prefix=/opt/apache/pcre2-10.40 && make && make install

cd /opt/apache/httpd-2.4.54 && ./configure --prefix=/opt/apache/httpd-2.4.54 \
--with-apr=/opt/apache/apr-1.7.0 --with-apr-util=/opt/apache/apr-util-1.6.1 \
--with-pcre=/opt/apache/pcre2-10.40/bin/pcre2-config && make && make install

echo "export HTTPD_HOME=/opt/apache/httpd-2.4.54" >> /etc/profile
echo "export PATH=\$HTTPD_HOME/bin:\$PATH" >> /etc/profile
source /etc/profile

卸载旧版本

yum -y remove httpd

httpd -v

启动|重启|关闭：httpd -k start|restart|stop
查看：ps -ef|grep httpd

1.编辑：/opt/apache/httpd-2.4.54/conf/httpd.conf
# 访问端口
Listen 8686
# 192.168.1.97为虚拟机ip地址
ServerName 192.168.1.97:8686
LoadModule proxy_module modules/mod_proxy.so
LoadModule proxy_http_module modules/mod_proxy_http.so
LoadModule proxy_balancer_module modules/mod_proxy_balancer.so
LoadModule lbmethod_byrequests_module modules/mod_lbmethod_byrequests.so
LoadModule lbmethod_bytraffic_module modules/mod_lbmethod_bytraffic.so
LoadModule lbmethod_bybusyness_module modules/mod_lbmethod_bybusyness.so
LoadModule lbmethod_heartbeat_module modules/mod_lbmethod_heartbeat.so
LoadModule slotmem_shm_module modules/mod_slotmem_shm.so2.重启Apache：httpd -k restart3.防火墙打开端口权限：firewall-cmd --zone=public --add-port=8686/tcp --permanent && firewall-cmd --reload

Apache访问​​​​​​​(http://192.168.1.97:8686)

反向代理与负载均衡(http://t.csdn.cn/nUaoU​​​​​​​)​​​​​​​​​​​​​​

1.虚拟机Apache访问主机Tomcat要求虚拟机能够ping通主机ip
虚拟机无法ping通主机ip-->主机启用防火墙入站规则-->文件和打印机共享(回显请求 - ICMPv4-In) "专用、公用"2.主机防火墙添加端口入站规则-->8181、8282、83833.反向代理配置(重启Apache)
ProxyPass "/"  "http://192.168.1.94:8181/"
ProxyPassReverse "/"  "http://192.168.1.94:8181/"4.负载均衡配置(重启Apache)
# Tomcat8欢迎页BalancerMember http://192.168.1.94:8181 loadfactor=1 timeout=5# Tomcat9欢迎页BalancerMember http://192.168.1.94:8282 loadfactor=2 timeout=5# Tomcat10欢迎页BalancerMember http://192.168.1.94:8383 loadfactor=3 timeout=5ProxySet lbmethod=bytraffic

ProxyPass "/"  "balancer://tomcats/"
ProxyPassReverse "/"  "balancer://tomcats/"解释说明：
主机浏览器访问虚拟机Apache，虚拟机Apache将请求转发到主机Tomcat，主机Tomcat将数据返给虚拟机Apache，
虚拟机Apache将数据返给主机浏览器，在实际应用中虚拟机Apache将请求转发给指定业务服务器获取业务数据